/Engine/Source/Runtime/Engine/Classes/Kismet/KismetMathLibrary.h
Returns a random point within the specified bounding box using the first vector as an origin and the second as the half size of the AABB.
static FVector RandomPointInBoundingBoxFromStream ( const [FRandomStream](API\Runtime\Core\Math\FRandomStream) & Stream, const FVector Center, const FVector HalfSize )